[OpenLayers-Users] reprojection of vector layer from wgs84 to
sphericalmercator
Christopher Schmidt
crschmidt at metacarta.com
Mon Jan 14 11:05:39 EST 2008
On Mon, Jan 14, 2008 at 10:09:46AM -0500, Mike Adair wrote:
> Note that this should work too, and allows you to handle points in
> coordinate systems other than EPSG:4326:
>
> - include proj4js in your app via the <script> tag
This isn't neccesary for spherical mercator: the reprojection code is
registered as a 'custom' projection so long as you have included
Layer.SphericalMercator in your build.
> preFeatureInsert = function(feature) {
> var src = new OpenLayers.Projection('EPSG:4326');
> var dest = new OpenLayers.Projection('EPSG:900913');
> for (var i = 0; i < feature.geometry.components.length; i++) {
> OpenLayers.Projection.transform(feature.geometry.components[i], src, dest);
> }
> };
Geometries can project themselves: instead of looping through the
componetns, you should just do:
feature.geometry.transform(src, dest);
This will transform in place.
Regards,
--
Christopher Schmidt
MetaCarta
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